Netflix is the largest source of internet traffic
Netflix now accounts for 22.2% of all Internet traffic in North America and up to 30% of all traffic during peak times, according to Sandvine, a manufacturer of network traffic control products.
So, Web Browsing must be, like 22.1%, right? Noooo... as you can see here, Web browsing (and other miscellaneous traffic using the http protocol) account for just 16.8% of traffic - less than BitTorrent at 21.6%. YouTube is the fourth largest traffic source at 8.2% of all traffic.
That leaves 31.2% for everything else, including not only email, twitter and FTP, but also ALL other on-line media traffic including iTunes, Hulu, and Amazon Video on Demand. So is your network only built to handle web pages and email? That accounts for less than 20% of what's actually be done with your network.
You probably ought to start looking at how to manage (and mitigate) the other 80%.
